Business Segment Information (Schedule Of Segment Revenue And Segment Operating Profit) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information
Total revenue		$ 1,545.0	$ 1,976.7	$ 4,935.4	$ 5,786.4
Total segment operating profit		146.2	319.1	597.0	855.2
Net interest expense		(8.1)	(8.0)	(24.4)	(24.5)
Income before income taxes attributable to FMC Technologies, Inc.	[1]	101.5	259.9	449.8	796.1
Operating segments | Subsea Technologies
Segment Reporting Information
Total revenue	[2]	1,093.7	1,300.4	3,490.3	3,831.0
Total segment operating profit	[2]	170.7	204.4	522.9	539.8
Operating segments | Surface Technologies
Segment Reporting Information
Total revenue		361.0	556.0	1,170.6	1,546.4
Total segment operating profit	[3]	(22.5)	109.5	67.9	276.6
Operating segments | Energy Infrastructure
Segment Reporting Information
Total revenue		97.1	124.9	299.4	419.6
Total segment operating profit		(2.0)	5.1	6.2	38.8
Segment reconciling items
Segment Reporting Information
Total revenue	[4]	(6.8)	(4.6)	(24.9)	(10.6)
Intercompany eliminations
Segment Reporting Information
Total segment operating profit			0.1
Corporate items
Segment Reporting Information
Corporate expense	[5]	(14.7)	(16.1)	(45.0)	(47.8)
Other revenue and other expense, net	[4],[6]	(21.9)	(35.1)	(77.8)	13.2
Net interest expense		(8.1)	(8.0)	(24.4)	(24.5)
Total corporate items		$ (44.7)	$ (59.2)	$ (147.2)	$ (59.1)

[1] Excludes amounts attributable to noncontrolling interests.

[2] Results of FTO Services are reported in Subsea Technologies. Refer to Note 7 for additional information.

[3] Includes asset impairment charges. Refer to Note 4 for additional information.

[4] Other revenue comprises certain unrealized gains and losses on derivative instruments related to unexecuted sales contracts.

[5] Corporate expense primarily includes corporate staff expenses.

[6] Other expense, net, generally includes stock-based compensation, other employee benefits, LIFO adjustments, certain foreign exchange gains and losses, and the impact of unusual or strategic transactions not representative of segment operations.